Machine for cutting key seats



R. J. MILLER. MACHINE FOR CUTTING KEY SEATS.

v APPLICATION men me. I6. 1920. 1,438,324, Patented Dec. 12, 1922.

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APPLICATION FILED AUGJB. I920.

Patented Dec. 12, 1922.

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J Y M' ATTORNEY B. I. MILLER. MACHINE FOR CUTTING KEY SEATS.

APPLICATION FILED AUG. I6. 1920.

Patented Dec. 12, 1922.

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WHILE DgMOQP/W" 'QSATTORNEY D R. 1. MILLER. MACHINE FOR cunme KEY SEATS.

I APPLICATION FILED AUG. 16,- 1920. 1,488,324, Patented Dec. 12, 1922.

W 5$HEET$-SHEET JO 2 11 M 1 4a ,2 50 4% a 4 45 M n 2 51 46 I 2 1! J5 551 J g J Patented Dec, 12, 1922.

hddd i MACHINE FOR CUTTING KEY SEATS.

Application filed August 16, 1920.

To aZZ whom it may concern:

Beit known that I, RAYMOND J. MILLER, of Rochester, in the county ofMonroe and State of New York, have invented certain new and usefulImprovements in Machines for Cutting Key Seats; and I do hereby declarethe following to be a full clear, and exact description of the same,reference being had to the accompanying drawings, forming a part of thisspecification, and to the reference numerals marked thereon My inventionrelates to metal, working machinery and more particularly to slot-tingmachines and it has for its object to provide an improved machine ofthis character for accurately cutting a key slot in a gear or othermember, and which is adapted for cutting such a slot on a taper, thatis, with a bottom inclined to the aXis of the workpiece. A furtherobject of the invention is to pro vide a simple, convenient, andserviceable machine for cutting such slots which shall be of rigidconstruction to enable quick and accurate operation thereof and whichshall be capable of cutting a slot the bottom of which is parallel or atany desired angle to the axis of the work in which such slot is made. Tothese and other ends the invention resides in certain improvements andcombinations of parts all as will be hereinafter more fully described,the novel. features being pointed out in the claims at the end of thespecification.

In'the drawings:

Figure 1 shows a side elevation of my machine;

Figure 2 a right hand end view of the machine shown in Figure 1;

Figure 3 is a top plan view:

Figure 1 is a left hand end view of the top of the machine shown byFigure 1;

Figure 5 is a view similar to Figure 3 with the pressure arm and workclamping means removed from cooperation with the work;

Figure 6 is a section on the line 66 of Figure 7;

Figure 7 is a section on the line 'Z*7 of Figure 3;

Figure 8 is a section on the line 88 of Figure 10;

Figure 9 is a view similar to Figure 7 but with the work table in aninclined position;

Figure 10 is a section on the line 10 10 of Figure 7,

Serial No. 403,793.

Similar reference numerals throughout the several views indicate thesame parts.

Machines of the class described may comprise a reciprocating toolfrequently with a serrated edge, a work table through which the cuttingtool operates, and a reciprocal driving member for the tool locatedbeneath thework table, which driving member affords the only guidingmeans for the cutter. Among the principal features of my invention maybe enumerated the facility of adjustment, ease of operation and accuracyof result of the machine, whether the bottom of the slot cut thereby beparallel with or at any angle to the axis of the work.

Referring to the drawings, numeral 10 indicates a pedestal support ofcast iron or other suitable material provided on one side thereof with adoor 9 to afford ready access for adjustment and lubrication of theparts within. The power for operating the machine may be transmitted toa fixed and loose pulley 11 on one end of a shaft 12 mounted in thebearing 13, and on the other end of which is provided a gear 14 incooperation with another gear 15 mounted on a spindle 16 within abearing 17. Projecting from the gear 15 is a pin 18 surrounded by abushing 19 adapted to move back and forth in the slot 20 to produce areciprocation of the cross head 21 carried by the guides 22 which in theembodiment shown by Figure 6 is a part of the frame containing thebearings 13 I and 17. To position the cross head in the guides 22 endstrips 23 are secured to the guides by means of bolts 24 or otherfastening means. Located adjacent the top of the cross head and guidedthereby is the cutting tool 25 secured thereto by the clamping device 26and adjusting screw 27. In order to move the clamping means 26 andcutting tool laterally of the cross head to properly aline the tool withthe slot 29 in the work 30 the adjusting screw 28 is provided in'thecross head and in cooperation with the clamping means 26. Pivoted to thetop of the pedestal 10 about the rod 31 by means of the depending lugs32 is the guide frame which is adjustably secured in position by meansof the clamping bolts 34 cooperating with the arcuate shaped slots inthe depending members 35 at the other end of the guide frame from thepivot 31. As a further means to insure the guide frame being held inadjusted position, a stop or limiting device is shown as comprising athreaded rod. extending from the pedestal and provided thereon with alOLf nut to secure the stop device and guide frame 53% in positionshould for any reason the bolt; l become loose. idably mounted upon thesnide f rune i tie work table 39 which in my embodiment shown is movableslot-1g; the guide frame by means of a rack 621 and pinion l secrredrespectively to the work table and guide frame and provided with ahandle 42 by means oi? which the work may be moved into or out cooperaion with the cutting the other or e of the work table operating handle1s provided a or limiting; mechan sm therefor coman adjustable pin 5'?and lock nut d into a depending edge of the and Int-ed to cooperate withthe adiacent edege o itate in adjustably and guide frame the deamountwhen the key slot is t be out n angle, graduations 38 be provided on theend or the depending}; members as i .hown in Figure 4:.

The work 30 may be positioned and clamped upon the table 39 by any wellknown HEQEIHS, but for purposes of illustration I have shown erodecentering and bracket for the work which is slidable in the grooveadjiiistable along the. table by means 01 the clamping bolt 44 incooperation with the under cut groove 45 in the .top of the table. Toenable gears or other work. 30 of diflt'erent size to be slotted without changing the position of the guide bracket e3 and to enable slots 29of dili erent depths to be cut in. the work. I have shown the table 39as provided with a longitudidisposed. perforation 4-6 and although, theembodiment shown, this perforation is closed on all four sides by thetable it will nevertheless be understood that other terms of grooves orperforations may be used with equal facility For purposes of clampingthe work upon the table, threaded posts d7 are provided and. betweenwhich entends the clamping; brace 4-8 provided with a work clamp 49 4ads adjustable to fit different heights of work by means of thethreaded. stem 50 in cooperation with the clamping brace 48. v Adjacentone end ot the guide frame is provided the upstanding: post 51 to whichis secured the adjustable carrier 52 for receiving; the pressure arm 53made adjustable in length by threaded cooperaprovided with a hardenedpoint 54 adapted to cooperate with the rear, of the cutting toolandpress or hold. the same in engagement with the work. In the form of myinvention illustrated, the arm 53 does not guide the cutting toolprevent lateral movement thereof. but merely presses the tool into engg'agei'nent with the work while the cross head 21 is the sole meansallerded for guiding the cutting tool. in Figure 5, the clamping braceis shown out of cooperation with one of the threaded rods 4:? to enablethe work to be removed. For this same purpose, the pressure rod is madejointed by having); the outer end pivotally supported at 55 to enablethe work to be withdrawn over the cutting tool and a new piece inserted.In order to give the pressure arm 53 the necessary rigidity and yet haveit jointed as shown the sleeve 56 is provided over the pivoted joint tosecurely hold both parts of the arm in alinement. When it is desired toremove the outer end from cooperation with the cutter 25, the sleeve 56may be easily slid out of engagement with the joint 55 while stop or pin60 is provided on the arm 53 for holding; the sleeve in position overthe pivot.

In operatiom power received by the pulley 11 is transmitted through theshaft 12 gears M- and 15, pin 18 to the cross head 21. whichreciprocates the cutting tool 25. To enable the slot 29 to be cut at anydesired angle, the guide frame is tilted and adjusted in the correctinclined posh tion by means of the clamping bolts and.

the additional stop mechanism 36, it desired. fitter arranging the partsin the manner shown by Figures and 7, the operating handle 4.2 may bemoved to give the work 30 any -:lesired rate of feed and the stopmechanism 5? which has been previously set to limit the depth of cutenables the depth of slot to be given to a number of pieces of work. Toremove the work and insert a new piece in position it is only ofadjustment whereby a key slot may be cut with its bottom parallel to orat an angle with the axis of the work, and the degree or" incline orslant tobe given tothe bottom of the key slot may be easily determinedby the graduations 38; The simplicity of: this type of hand operationenables" 1 ,aeaeea any desired rate of feed to be obtained, while thestop mechanism 57 insures the same amount of out being given to a numberof different pieces of work. The facility with which the clamp 49 andthe pressure arm may be removed to enable the work to be removed and anew piece of work inserted, is an advantageous time saver. Theadjustment 28 which is made easily accessible by means of the door 9enables cutting tools of diiterent widths to be used and enables thecenter line of the difierent tools to be always alined with the samecenter line of the work or slot to be cut. Because of the rigidity ofthe cutting tool, a better and more accurate slot can be obtained thanis possible with the older, slower, and less reliable machines inwhichthe taper is cut by tilting the tool instead of the work and its bed.

I claim as my invention:

1. In a slot cutting machine, the combination with a work table providedwith an aperture and a reciprocatory tool operatingmember movable insubstantial alinement with said aperture and provided with a transverseguide, of a tool holder for clamping a tool in operative position towork through the aperture, and means for adjusting the tool holder inthe transverse guide.

2. In a slot cutting machine, the combination with a slidable work tableprovided with a perforation, of a cutting tool mounted for reciprocationthrough said perforation, operating mechanism for said tool, a holderfor clamping the tool in operative position, said holder beingadjustable to fit tools of different widths and means for adjusting theholder transversely to aline the tool with the slot to be out.

3. In a slot cutting machine, the combination with a support, of atilting work table and guide therefor adj ustably pivoted to thesupport, a cutter mounted on one side of said work table and a pressurearm of adjointed to swing upon itself and being provided with a slidingsleeve for holding the jointed portion in operative position.

l. In a slotting machine, the combination with an adjustably tiltingwork table, of a cutting tool mounted for reciprocating movementrelative to the table, a driving member for the cutting tool attachedthereto and means for securing the tool to the driv ing member, saidsecuring means embodying a clamping member adapted to fit differentwidths of tools and being laterally movable relative to the drivingmember to aline the tool with the center line of the work, and meansindependent of said clamping member for so moving the securing meanslaterally.

5. In a key slot cutting machine, the combination with a support, of atilting guide member adjustably pivoted thereto, a work table slidableon the guide member, means for clamping the work on the table, aserrated cutter, adjustable stop devices for limiting movement of thework table and of the guide member, a hand operated feed mechanism forsliding the work table over the guide member, a jointed pressure armadjustable as to length and height in cooperation with one side of thecutter for holding the same against the work, a reciprocat-- ing drivingmember for the cutter located beneath the work table and adjustableclamping means on the driving member adapted to receive cutters ofdifferent widths, said clamping means being adjusta ble relative to thedriving member to aline the cutter with the transverse axis of the work.

RAYMOND J. MILLER.

